When you say “ISIS”, you mean CIA, right?
They are hired by anonymous persons, all they have to do is send real money and real weapons, half before, half after.
The CIA is perfectly capable of doing this, and they already know who to contact to deliver the weapons.
They also have assets in Moscow for real time reconnaissance on what theaters have police or security presence.
A less than a month warning come true?
Easy as ordering a hamburger on a smart phone.